85 



iions given in the British Admiralty tables (H. D. 282). The cor- 

 rected soundings have been tabulated and forwarded to the United 

 States Hydrographic Office and to the International Hydrographic 

 Bureau. Figiu-e 24 is a bathymctric chart based on these soundings, 

 those taken on the Marion expedition,^ soundings plotted on H. O. 

 Chart 955 marked "Small corrections, September 1934", and 10 

 soundings taken by the Geriium research ship Meteor in March 1935, 

 and kindly furnished by the Institut xiir Meereskunde an der Univer- 

 sitat, Berlin. In figure 24 contour lines have been drawn for every 

 500 meters depth, beginning with the 1,500-meter contour. The 

 soundings taken on this cruise indicate that although the end of 

 Reykjaues Ridge does project to the southwestward, and the shoulder 

 of Flemish Cap extends toward Reykjaues Ridge, there is a channel 

 deeper than 4,500 meters between them. This channel can be fol- 

 lowed in a general northwesterly direction with continuously decreas- 

 ing depths to about 55°48' N., 49°22' W., where the channel has a 

 depth of about 3,700 meters. Continuing northwestward from here 

 the depth again increases. The channel is winding and in places is 

 narrow so that these featuies may considerably restrict the movement 

 ol bottom water. A narrow trough having depths slightly greater 

 than 4,000 meters is located in about latitude 54° N., between about 

 longitudes 42° W. and 45° W. This trough is shut off from com- 

 munication with the Western Atlantic Basin by thresholds of about 

 3,700 meters depth. A more detailed discussion of the oceanographic 

 results of this post-season cruise will appear in a later bulletin. 



During the ice season, and in continuation of cooperation with the 

 Newfoundland Fisheries Research Laboratory at Bay Bulls, abstracts 

 of temperatures and salinities measured were forwarded to that 

 liiboratory promptly upon the return of the General Greene to St. 

 John's at the conclusion of each survey. Other incidental data 

 collected on the General Greene consisted of barograms and sea-water 

 surface thermograms. 



The equipment was similar to that used during the 1934 season. 

 Nansen reversing M^ater bottles were irsed for the collection of samples, 

 Ricbter and Wiese protected and im protected thermometers were 

 used for the measurement of temperatures and the determination of 

 the depths of observation, and the new model Wenner salinity bridge, 

 described in United States Coast Guard Bulletin No. 24, was used as 

 the routine method of measuring salinities. The calibration of the 

 salinity bridge was checked on several occasions in port by simul- 

 taneous bridge and titration measurements on samples collected at 



2 Noble (). Ricketts. Bathymetry of Davis Strait U. S. Coast Guard Bulletin 19, Part 1, pp. 53-61, 

 Washington, 1932. 



Note. — All the soundings considered by Ricketts on page CO above, wL:ieh were located in the area in 

 question, have been used in the construction of figure 24 



